nbc's steve handlesman reports from denver. >> reporter: the pressure is intense. president obama took time out for a visit to hoover dam. >> it's spectacular and i've never soon it before. >> reporter: mitt romney grabbed a burrito bowl. doug hudson, andrew luntkin and chris conroy run bicycle companies in colorado. they took me out to red rocks. these guys will watch the debate, andrew hoping for a breakthrough by his candidate, mitt romney. >> i want him to talk about conservative values, especially economically, empowering small businesses. >> reporter: chris used to vote republican. not anymore. >> what really changed my mind recently is it seems to have gotten away from taking care of the little guy. >> reporter: doug is undecided. i'd like to see some details both from romney and obama mainly on tax policy. >> reporter: vice president biden charged team romney would hike middle class tax. >> how they can justify raising taxes on the middle class that's been buried the last four years. >> reporter: the republicans jumped on that. buried by obama? >> vice pres